In a large bowl, combine all ingredients. Pour into prepared dish.
Bake covered for 1 1/2 hours.
SLOW COOKER VARIATION: Combine all ingredients except broccoli in slow cooker. One hour before end of cooking time, stir in broccoli. Cook on high for total of 3-4 hours or on low for total of 6-7 hours. If casserole is too runny as end of cooking time nears, remove lid from slow cooker for 15 minutes while continuing to cook on high.